Carburetor



(No Model.). I

E. A. SMITH.

GARBURETOR. Y No. 502,781. Patented Aug. 8, 1893 UNITED STATES PATENTOFFICE.

EDWVARD A. SMITH, OF HAMILTON, OHIO.

- CARBU RETOR.

SPECIFICATION forming part of Letters Patent No. 502,781, dated August8, 1893. Application filed March 30, 1893. Serial No. 468,310- (Nomodel.)

T0 at whom it may concern: I

Be it known that I, EDWARD A. SMITH, of Hamilton, Butler county, Ohio,have invented certain new and useful Improvements in Carburetors, ofwhich the following is a specification.

My invention relates to that class of gas generators wherein air iscarbureted by contact with hydro-carbon'or gasoline, and the objects ofmy improvements are to carburet the air only as it is used,to dispensewith the holder wherein the manufactured gas is usually stored,-to keepthe air in contact with the gasoline through a longer distance, and toautomatically expose a constant amount of gasoline to the action of theair without regard to the quantity stored in-the tank. These objects areobtained in the following described .manner, as illustrated by theaccompanying drawing, in which an elevation is shown of the variousparts in their relative positions.

In the drawing, A represents the carburetor, which consists of gas pipeB coiled in the form of avertical helix. The top end of said pipeterminates in a vertical direction from the carburetor in chamber 0which is formed by an enlargement of pipe B. Collapsible bag D,communicates with said chamber, and is supported by concave pan orwasher E. Pipe F leads from the chamber to meter G and thencedistributes the gas to the burners.

H represents an air compressor usually operated by a weight, andprovided with air inlet I. Pipe J conveys the air from the compressorthrough the lower end of pipe B to the carburetor. Said pipe passes nearbag D and is provided with valve or cock K, which regulates the flow orpressure of the air through said pipe. Said valve is operated by avertical movement of lever L connected thereto which extends in ahorizontal direction over and beyond the top of bag D, on which it issupported by means of the inverted concave washer M. Said lever may begraduated, and is provided with a sliding weight N which causes thelever to descend and open the valve, when not held up by theexpansion'of the bag. A projection on pan E under lever L interceptsweight N in its descent.

0 represents an air tight tank, or receptacle for the gasoline. Pipe Rconveys the gasoline from the bottom of the tank to the carburetor, andis provided with cock S.

In operation the tank is located slightly higher than the carburetor, topermit the gasoline to flow by gravity through pipe R to the carburetor,until it reaches the same level in the vertical part of pipe B thatexists inside the tank. There being no pressure within chamber 0, bag Dcollapses, and weight N has caused lever N to descend and open valve K.The compressed air now passes from compre'ssor H through pipe J to thebottom of the carburetor, and in contact with the gasoline therein,through which it percolates slowly to chamber 0 and by expanding bag Draises lever L and closes valve K. The air in chamber O is nowthoroughly carbureted by its passing through the'gasoline in thecarburetor, and is conveyed through pipe F and the meter to the burners.Its consumption reduces the pressure in the chamber and the bagwhich ispreferably spherical in formuntil the weight causes the lever to descendand open the valve for the admittance of more air to the carburetor.When the pressure of the gas increases, the bag expands and forces thelever upward which closes the valve and stops further increase ofpressure. In this manner the pressure of the gas is automaticallyregulated, and continued substantially constant, regardless of number ofburners in use, or the quantity of gas being consumed. The pressurehowever may be varied by sliding the weight far-' ther out or in, on thelever until it requires more or less pressure in the bag to raise it.The level of the gasoline in pipe B varies in extent only equal to thedepth of the tank, whichis purposely constructed shallow. This smallvariation in the distance of the gasoline through which the air passesin being carbureted, is unnoticeable, and the air is passed throughsubstantially the same distance of gasoline whether the tank is full orempty. As the tank becomes empty, air finds its way therein from pipeBthrough pipe R, and keeps the pressure in the tank equal to that in thechamber.

In filling the tank, stop cocks-S should be closed, to prevent theescape of the gas from pipe B.

The compressor may contain air under a high pressure, when valve N willpermit only a sufiicient amount to pass to keep up the desired lowerpressure at the burners.

Valve N may be constructed to automatically reduce the pressure from thecon pressor, without being operated by the expansion of the bag. Thecompressor however may be adapted to automaticallysustain the lowpressure suited to the burners. In this case the valve may be dispensedwith, together with the bag and the chamber. The use of either the bagor the chamber, or both, is preferable, by reason of the greaterelasticity of the larger body of gas contained therein, tending tocounteract any possible sudden fluctuations of pressure, and to keep thepressure at the burners more steady, and constant.

Having fully described my invention, What I claim, and desire to secureby Letters Patent, is-

1. In a gas generator, the combination with a substantially U shapedcoiled pipe, both ends of which extend above the coil and one endprovided with a shallow oil supply adapted to keep both ends of the pipefilled with oil level with the surface of the oil within the supply,whereby the air is carbureted by its passage through a volume or body ofoil, of

an air compressor and a regulator connected with the inlet of the pipefor admitting air into the coiled portion of the pipe, and mechanismconnected with the outlet of the pipe and with the regulator of theinlet pipe, whereby the admission of the air is governed by the escapeof the gas.

2. In a gas generator, the combination, with a coiled pipe, each end ofwhich is extended substantially parallel one With the other, and one ofthem is provided with a chamber and is connected with a gas outlet, andthe other one is connected with an air supply and is provided with avalve, a concaved pan on the top of the chamber provided with anextension, a lever connected with the valve and extended over thechamber and provided with an inverted concaved portion, a collapsiblebag between the two concaved portions and communicating with theinterior of the chamher, a weight on the lever, adapted to engage withthe extended portion of the pan, and an oil supply connected with thepipe between the chamber and the coil.

EDWVARD A. SMITH. Witnesses:

ROBERT S. CARR, ISRAEL WILLIAMS.

